Casen is riding a Ferris Wheel that is 20 m in diameter
what is the period?
amplitude?
radius?
maximum?
minimum?
axis of the curve?
You have not really given enough info to answer all these questions.
The diameter is 20m the radius is half the diameter.
the maximum height is 20m
the minimum height is 0m (not really but close ehough)
You need to give more information for the rest.